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Home >> Subaru >> 2022 >> Ascent Touring >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Body Control System (Diagnostics) >> Diagnostics with Phenomenon >> Inspection >> The Lighting Does Not Switch From High Beam To Low Beam Automatically

The Lighting Does Not Switch From High Beam To Low Beam Automatically

Trouble symptom: 

High beam light does not go off automatically even when the high beam assist indicator is illuminating.

CAUTION: Before performing diagnosis, refer to "CAUTION" in "General Description". Ref. to BODY CONTROL (DIAGNOSTICS)>General Description>CAUTION .
  1. CHECK HIGH BEAM ACTIVATION (CHECK BY MANUAL OPERATION)  .

    Check for the activation of the high beam.

    • Light SW position: Second notch
    • Dimmer Hi SW: ON

    Does the high beam light come on?

    Yes  : Go to  2.

    No  : Check the headlight system. Ref. to LIGHTING SYSTEM>HEADLIGHT SYSTEM .

  2. CHECK LOW BEAM ACTIVATION (CHECK BY MANUAL OPERATION)  .

    From the condition in step 1, turn the dimmer Hi SW to OFF.

    Does it switch to low beam?

    Yes  : Go to  3.

    No  : Check the headlight system. Ref. to LIGHTING SYSTEM>HEADLIGHT SYSTEM .

  3. RECOGNITION TEST (CHECK OF HBA HI PERMISSION FLAG)  .
    1. Set the vehicle in a stopped state.
    2. Set the light SW position to Auto.
    3. Set the dimmer Hi SW to ON.
    4. Using the Subaru Select Monitor, check the following items in the [Data monitor] of [EyeSight]. Ref. to EyeSight (DIAGNOSTICS)>DATA MONITOR .
      • HBA Control Permission

    Is [HBA Control Permission] set to [Allowance]?

    Yes  : Replace the stereo camera. Ref. to EyeSight>STEREO CAMERA .

    No  : Check the headlight system. Ref. to LIGHTING SYSTEM>HEADLIGHT SYSTEM .